An atomizing injection device and an atomizing injection method

Abstract

The present invention discloses an atomizing injection device and an atomizing injection method, belonging to the technical field of atomizing injection. The atomizing injection device of the present invention includes a heating pipe installed in a housing, the heating pipe is communicated with a nozzle, the heating pipe includes a wide-diameter pipe and a coiled pipe, the wide-diameter pipe is a straight pipe structure, and the inner diameter is not less than 2 times the inner diameter of the coiled pipe; the wide-diameter pipe is sleeved inside the coiled pipe, and its tail end is close to the combustion mechanism, and the liquid inlet at the tail end of the wide-diameter pipe is communicated with the liquid outlet of the coiled pipe; the distance between the tail end of the wide-diameter pipe and the end face of the combustion mechanism is not less than 15 mm, forming a fuel injection area. This solution combines a coiled pipe with a smaller pipe diameter and a straight pipe with a larger pipe diameter, which delays the fouling and blockage of the pipeline while realizing atomization, and has a better use effect.

Description

Technical Field

[0001] The present invention relates to the technical field of steam sprayers, and more specifically, to an atomizing spraying device and an atomizing spraying method for heating a liquid to form steam and achieving an atomizing effect after spraying. Background Art

[0002] A steam sprayer is a small atomizing spraying device that uses the heat energy generated by fuel combustion to heat the liquid in a coil pipe, causing the liquid to become a high-temperature and high-pressure gas, which atomizes when sprayed out of the nozzle. It can be used in the fields of pesticide spraying and steam cleaning.

[0003] When a steam sprayer is in use, the liquid medium used is mostly aqueous solution, or some reagents that are beneficial to volatilization are added to the aqueous solution to form an auxiliary agent, and its main component is still water. For steam sprayers, the aqueous solution is mostly obtained from ordinary water sources such as tap water, well water, and river water, which contain a large amount of impurities. After high-temperature heating, substances such as calcium and magnesium ions in the steam will precipitate and adhere to the surface of the pipeline, thereby forming scale and blocking the pipeline.

[0004] As disclosed in the steam sprayer solution of patent ZL2023231766242, the structure is as Figure 1 shown. It has a coil pipe in the combustion chamber. The head end of the coil pipe is connected to an external auxiliary agent pipe. After passing around the coil pipe, the tail end passes through the inside of the coil pipe to form a straight pipe section and is connected to a nozzle at the outlet. In the field of sprayers, the diameter of the coil pipe is generally about 3 mm. If it is too large, its heat absorption effect will be affected, but this kind of pipeline is very easy to block.

[0005] In other fields, such as some steam generators and boilers, a scheme with a large-diameter coil pipe can be adopted. Partial blockage will not affect the overall use, and the frequency of cleaning required is relatively low. However, for a steam sprayer, if the pipeline diameter is increased, the overall volume will become larger, greatly increasing the requirements for the liquid supply pump and being not conducive to hand-held operation. More importantly, in order to ensure the atomizing effect, the flame intensity must be increased. On the one hand, this will cause a large consumption of fuel oil for the sprayer, and on the other hand, it will make the surface temperature of the shell of the steam sprayer relatively high, posing a great safety hazard when used in agriculture; and it is simply impossible to perform hand-held operation.

[0006] Based on the current situation, in order to extend the service life of the steam sprayer, it is necessary to regularly use chemical reagents to clean the pipeline to remove the scale inside the pipeline. Therefore, how to avoid the blockage of the steam sprayer pipeline is still a difficult problem faced at present. Summary of the Invention

[0007] 1. Technical Problems to be Solved by the Invention

[0008] The object of the present invention is to overcome the problem that the coiled pipe is prone to blockage in the prior art, and provide an atomizing injection device and an atomizing injection method. This solution combines a coiled pipe with a smaller diameter and a straight pipe with a larger diameter, which delays the fouling and blockage of the pipeline while realizing atomization, and has a better use effect.

[0009] 2. Technical Solution

[0010] To achieve the above object, the technical solution provided by the present invention is as follows:

[0011] An atomizing injection device of the present invention includes: a combustion mechanism for providing a flame for combusting fuel, a housing, a heating pipe, and a nozzle. The tail end of the housing is hermetically connected to the combustion mechanism, a smoke exhaust passage is provided at the head end of the housing, and the flame generated by the combustion mechanism burns inside the housing.

[0012] The heating pipe is arranged inside the housing and includes a wide-diameter pipe and a coiled pipe; wherein, the coiled pipe is in a spiral structure and spirally extends along the axial direction of the housing; the wide-diameter pipe is sleeved inside the coiled pipe in the form of a straight pipe, and the liquid inlet at its tail end is communicated with the liquid outlet of the coiled pipe; the inner diameter of the wide-diameter pipe is not less than 2 times the inner diameter of the coiled pipe; the distance between the tail end of the wide-diameter pipe and the end face of the combustion mechanism is not less than 15 mm, forming a fuel injection area; the nozzle is connected to the head end of the wide-diameter pipe, and after the high-pressure medium is ejected from the nozzle, atomized particles are formed.

[0013] Further, the inner diameter of the coiled pipe is 3.8 - 6.8 mm, and the inner diameter of the wide-diameter pipe is 2.5 - 4.8 times the inner diameter of the coiled pipe.

[0014] Further, the inner diameter of the wide-diameter pipe is 14 - 22 mm.

[0015] Further, at the tail end of the coiled pipe, the radial distance between the coiled pipe and the housing is not greater than 8 mm.

[0016] Further, at the tail end of the coiled pipe, the distance between the spiral ring surrounded by the coiled pipe and the wide-diameter pipe is not less than 4 mm, forming a flame channel for guiding the flame.

[0017] Further, at least the pipes on one side of the tail end of the coiled pipe are closely arranged; the length of the interval where the coiled pipes are closely arranged is L, and this length L is not less than 1 / 3 of the length of the coiled pipe.

[0018] Further, the nozzle is detachably installed at the head end of the wide-diameter pipe, and the end of the housing has a flame cover plate, and the wide-diameter pipe penetrates through the flame cover plate, so that the nozzle can be connected to the wide-diameter pipe from the outside of the flame cover plate.

[0019] Further, the tail end of the wide-diameter pipe adopts an interface pipe structure, and the inner diameter of this interface pipe is smaller than the inner diameter of the wide-diameter pipe, so that the wide-diameter pipe is connected to the nozzle with a smaller interface.

[0020] Furthermore, the interface pipe has an internal thread, and the depth of the thread in the axial direction is not less than 4 mm.

[0021] Furthermore, the head end of the coil passes through the flame cover plate, and the flame cover plate is removed, so that the wide-diameter tube and the coil can be taken out at the same time.

[0022] Furthermore, the nozzle includes a connector and a nozzle, the connector is connected to the wide-diameter pipe in a threaded manner; the nozzle has a variable diameter structure to change the flow rate of the medium to achieve atomization.

[0023] Furthermore, the nozzle is provided with a medicine nozzle, which intersects with the nozzle channel so that the medicine and the steam medium can be mixed.

[0024] Furthermore, the combustion mechanism is coaxially arranged with the shell, and an oil injection port is arranged on the end surface of the combustion mechanism facing the shell. In cross-sectional projection, the oil injection port is located in the spiral ring of the coil.

[0025] Furthermore, a fan is provided on a side of the combustion mechanism facing away from the shell, and the fan, the combustion mechanism and the shell are located on the same center line.

[0026] An atomizing spraying method of the present invention adopts an atomizing spraying device for atomization. The atomizing spraying device is configured to have a combustion mechanism, a shell and a nozzle. A heating tube is installed in the shell, and the heating tube is connected to the nozzle. The combustion mechanism sprays flame into the shell to heat the heating tube.

[0027] The heating tube is configured to include a wide-diameter tube and a coil. The tail end of the wide-diameter tube is close to the combustion mechanism, and the liquid inlet at the tail end of the wide-diameter tube is connected to the liquid outlet of the coil. The liquid medium is first quickly heated in the coil and then enters the wide-diameter tube for further heating and vaporization.

[0028] The inner diameter of the wide-diameter tube is not less than twice the inner diameter of the coil. The inner cavity of the wide-diameter tube forms a larger volume space, so that there is a large pressure difference between the liquid inlet and the inner cavity of the coil, and the pressure in the inner cavity is greater than the external air pressure, so that the liquid medium is atomized when sprayed out from the nozzle.

[0029] Furthermore, an annular flame channel is arranged between the spiral ring of the coil and the wide-diameter tube; the inner diameter of the coil is 4.0-6.8 mm, and the inner diameter of the wide-diameter tube is 2.5-4.5 times the inner diameter of the coil, so that the wide-diameter tube forms an expansion and pressure reduction space relative to the coil.

[0030] Furthermore, the nozzle can be detachably connected to the wide-diameter pipe in a threaded manner.

[0031] Further, a flame cover plate is provided at the head end of the housing. The large-diameter pipe is fixedly connected to the flame cover plate, and an interface pipe is formed outside the flame cover plate. The interface pipe is provided with a threaded connection port smaller than the inner diameter of the large-diameter pipe for connecting the nozzle.

[0032] 3. Beneficial Effects

[0033] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects:

[0034] The atomizing injection device of the present invention changes the traditional single-pipe heating method to a double-pipe heating method. The relatively large inner cavity of the large-diameter pipe provides space for liquid vaporization, thereby effectively releasing the high pressure formed in the narrow space. Furthermore, a larger pressure difference can be formed at both ends of the coil pipe, accelerating the flow rate of the liquid in the coil pipe. The crystals precipitated in the coil pipe can be continuously washed into the inner cavity of the large-diameter pipe, and many precipitated particles can be ejected from the nozzle. Therefore, it can well relieve the blockage condition in the coil pipe. Description of the Drawings

[0035] Figure 1 is a schematic structural diagram of the existing coil pipe;

[0036] Figure 2 is a schematic diagram of an implementation manner of the atomizing injection device;

[0037] Figure 3 is a schematic diagram of an implementation manner of the heating pipe;

[0038] Figure 4 is Figure 3 the sectional structural diagram of the heating pipe in

[0039] Figure 5 is a schematic diagram of the coil pipe adopting equally-diameter closely arranged pipes;

[0040] Figure 6 is a schematic diagram of an implementation manner of the large-diameter pipe adopting a combination of two-end pipes;

[0041] Figure 7 is a schematic diagram of an implementation manner of the connection between the nozzle and the large-diameter pipe;

[0042] Figure 8 is a schematic diagram of another implementation manner of the connection between the nozzle and the large-diameter pipe;

[0043] Figure 9 is a schematic diagram of an implementation manner of the nozzle in the nozzle.

[0044] Description of the reference numerals in the schematic diagram:

[0045] 11. Combustion mechanism; 12. Fan;

[0046] 2. Housing;

[0047] 3. Heating tube; 31. Wide-diameter tube; 311. Inner cavity; 312. Cover plate; 313. Interface tube; 32. Coiled tube; 321. Auxiliary agent tube

[0048] 4. Nozzle; 41. Connector; 42. Nozzle; 43. Chemical agent spray port

[0049] 5. Handle Detailed implementation manner

[0050] To further understand the content of the present invention, the present invention will be described in detail in combination with the accompanying drawings and embodiments

[0051] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed by the present invention can cover. At the same time, terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present invention can be implemented

[0052] Combined with Figure 2 , this embodiment provides an atomizing spraying device, including a combustion mechanism 11, a housing 2 and a nozzle 4. The combustion mechanism 11 is used to provide a flame for burning fuel. The tail end of the housing 2 is hermetically connected to the combustion mechanism 11. A smoke exhaust passage is provided at the head end of the housing 2. The flame generated by the combustion mechanism 11 burns inside the housing 2 to provide the heat required for atomization. The burned flue gas is discharged from the smoke exhaust passage

[0053] A heating tube 3 is arranged inside the housing 2, which includes a wide-diameter tube 31 and a coiled tube 32; wherein, the coiled tube 32 is of a spiral structure and spirally extends along the axial direction of the housing 2. The wide-diameter tube 31 is sleeved inside the coiled tube 32 in a straight tube form, and the liquid inlet at its tail end is communicated with the liquid outlet of the coiled tube 32; the inner diameter of the wide-diameter tube 31 is not less than 2 times the inner diameter of the coiled tube 32; the distance between the tail end of the wide-diameter tube 31 and the end face of the combustion mechanism 11 is not less than 15 mm to form a fuel injection area

[0054] The heating pipe 3 is connected to the nozzle 4 to deliver the heated liquid medium to the nozzle 4 for spraying. Here, the combustion mechanism 11 is generally a fuel mechanism, and air is supplied to the combustion mechanism 11 by a blower 12. The blower 12 can be located on the side or coaxially arranged with the combustion mechanism 11. The ignited flame burns inside the housing 2 to heat the heating pipe 3. The liquid medium is first rapidly heated and raised in temperature in the coiled pipe 32, then enters the wide-diameter pipe 31 for vaporization, and is then sprayed out through the small-diameter nozzle 4 to form an atomization effect.

[0055] For the liquid medium inlet pipeline, pumping pipeline, air supply structure, etc., the existing steam sprayer structure can be referred to.

[0056] Combined with Figure 3 In an embodiment shown, the coiled pipe 32 is a spiral structure formed by winding a pipe in a circle, and it spirally extends along the axial direction of the housing 2. The wide-diameter pipe 31 is a straight pipe structure, and the wide-diameter pipe 31 is sleeved inside the coiled pipe 32. Its tail end is close to the combustion mechanism 11, and the liquid inlet at the tail end of the wide-diameter pipe 31 is connected to the liquid outlet of the coiled pipe 32. The wide-diameter pipe 31 being a straight pipe structure is in contrast to the spiral form of the coiled pipe 32. The wide-diameter pipe 31 presents as a straight line form as a whole, and it is not required that its surface must be of the same size, and there can be local changes. For example, the wide-diameter pipe 31 can be a pipe structure with different diameters at both ends, and the two sections of the pipe are coaxially arranged.

[0057] Combined with Figure 4 which shows the Figure 3 cross-sectional structure schematic diagram. In specific implementation, the inner diameter of the wide-diameter pipe 31 is not less than 2 times the inner diameter of the coiled pipe 32. For example, for an existing coiled pipe 32 with an inner diameter of about 3 mm, if the inner diameter of the coiled pipe 32 is selected as 3.5 mm, the inner diameter of the wide-diameter pipe 31 can be 12 mm or 15 mm. In some embodiments, the coiled pipe 32 can adopt a larger size, such as about 6 mm, so as to reduce the thermal efficiency. The inner diameter of the wide-diameter pipe 31 is about 20 mm, so as to avoid blockage.

[0058] In some embodiments, the inner diameter of the coiled pipe 32 used is 3.8 - 6.8 mm, such as 5 mm, 6 mm. Under the same flame intensity, compared with the pipe with an inner diameter of about 3 mm, using a pipe with a larger inner diameter will inevitably reduce its heating efficiency, thus being able to delay the vaporization time of the liquid medium, and thus being able to form a cooperation with the wide-diameter pipe 31.

[0059] Furthermore, in some embodiments, the inner diameter of the coiled pipe 32 used is 3.8 - 6.8 mm. At the same time, the inner diameter of the wide-diameter pipe 31 is 2.5 - 4.8 times the inner diameter of the coiled pipe 32. For example, the inner diameter of the wide-diameter pipe 31 is 10 - 25 mm.

[0060] In some embodiments, the inner diameter of the wide-diameter pipe 31 can be limited to 14 to 22 mm, for example, 16 mm or 18 mm, and can be controlled within 4 times the inner diameter of the coil pipe 32. The thickness of the wide-diameter pipe 31 is generally within 0.8 to 1.8 mm. Without special instructions, it can be considered within this range.

[0061] Adopting this solution, the relatively large inner cavity of the wide-diameter pipe 31 provides space for liquid vaporization, thus effectively releasing the high pressure formed in the narrow space. Furthermore, a greater pressure difference can be formed at both ends of the coil pipe 32, accelerating the flow rate of the liquid in the coil pipe 32. The crystals precipitated in the coil pipe 32 can be continuously washed and brought into the inner cavity 311 of the wide-diameter pipe 31, and some fine particles can be ejected from the nozzle 4. Therefore, the blockage in the coil pipe 32 can be well alleviated.

[0062] That is to say, this solution changes the existing scale cleaning method. The prior art is to clean with chemical reagents when the steam sprayer is in a non-working state; while this solution reduces the possibility of scale deposition when the steam sprayer is in a working state, thereby realizing the self-dissolution of scale.

[0063] Based on this structure, in one embodiment, the nozzle 4 can be directly welded to the wide-diameter pipe 31 to form an integral structure. Inside the wide-diameter pipe 31, due to the relatively large pipe diameter, the presence of some scale deposits will not affect the operation of the device. When there is more scale deposit, the relatively fast flow rate will wash away some scale deposits and eject them.

[0064] Regarding the position structure of the wide-diameter pipe 31, it is required that the distance between the tail end of the wide-diameter pipe 31 and the end face of the combustion mechanism 11 is not less than 15 mm to form a fuel injection area and guide the flame. This distance can be controlled within the range of 15 to 45 mm, such as 20 mm, 28 mm, 35 mm. During operation, the liquid medium is initially heated in the coil pipe 32. After entering the wide-diameter pipe 31, a large amount of the liquid vaporizes after further heating, and then is sprayed outwards through the nozzle 4 to form an atomization effect. At the tail end position, the liquid outlet of the coil 11 can be connected to the end face of the wide-diameter pipe 31. More preferably, the liquid outlet of the coil 11 is connected to the side wall at the tail end of the wide-diameter pipe 31, so as to facilitate leaving the injection area.

[0065] In the existing coil structure, due to the relatively small pipe diameter, it does not affect the combustion of the flame. However, in this embodiment, since the diameter of the wide-diameter pipe 31 is relatively large, it will block the fuel sprayed by the combustion mechanism 11. If the distance from the end face of the combustion mechanism 11 is relatively close, a large amount of the sprayed fuel will directly hit the end face of the wide-diameter pipe 31, forming oil droplets concentrated at the tail end, reducing the combustion sufficiency. In addition, it will cause the flame to be sprayed radially, resulting in an increase in the surface temperature of the housing and making it inoperable. By forming a certain spacing, the influence on fuel injection is reduced, enabling the flame to burn within the spiral ring and improving the heating intensity.

[0066] In some embodiments, at the end of the coiled pipe 32, the radial distance between the coiled pipe 32 and the housing 2 is not greater than 8 mm. For existing coiled pipes, in order to improve the thermal efficiency, it is necessary to make the flame surround the pipe of the coiled pipe 32. Therefore, there will be a relatively large radial distance between the coiled pipe 32 and the housing 2 for the flame to flow through. In this embodiment, it is desired that the flame heats the wide-diameter pipe 31 as much as possible while reducing the thermal efficiency of the coiled pipe 32. Therefore, the radial distance between the coiled pipe 32 and the housing 2 is controlled to be not greater than 8 mm, and further can be limited within 5 mm, so that the flame burns and flows in the spiral ring as much as possible.

[0067] An annular flame channel is formed between the spiral ring surrounded by the coiled pipe 32 and the wide-diameter pipe 31, and the radial dimension of this flame channel is not less than 4 mm to ensure that enough flame heats the wide-diameter pipe 31. The radial dimension of this flame channel can preferably be controlled within 6 - 14 mm.

[0068] For this flame channel, at least the pipes on the first-end side of the coiled pipe 32 are closely arranged to direct the flame into the flame channel. At the first end, a large amount of flame is directed into the flame channel, and due to the closely arranged pipes in the coiled pipe 32, the flame will jet and burn in the flame channel, thereby enhancing the heating intensity of the wide-diameter pipe 31 and vaporizing the liquid inside it.

[0069] The so-called "closely arranged" does not require no gap between the pipes, and adjacent pipes can be in contact with each other. Due to factors such as deformation during processing, there may be some gaps between the pipes. For example, the gap is within 2 mm, which still belongs to the range of "closely arranged". The "first end" and "end" referred to in the patent are used to indicate the orientation and cannot be narrowly regarded as referring to specific end faces.

[0070] In the traditional scheme, such as Patent 202322476199.2, in order to increase the waste heat utilization rate, a coiled pipe with closely arranged pipes is used to replace the housing to preheat the liquid. In fact, this structure only serves to cool the outside and cannot improve the thermal efficiency.

[0071] Because for this steam sprayer structure, due to the limitation of the external housing, the combustion space is limited, and the air provided by the fan is mainly sprayed outward from the middle of the coiled pipe. In conventional thinking, it is considered that the temperature of the outer flame is higher because the outer flame of the flame contacts the air and burns most fully. However, inside the housing, since the air supply by the fan is sprayed from the middle of the housing, in fact, the temperature of the inner flame is the highest. Therefore, a coiled pipe with a spiral ring radial dimension of about 25 mm is used to vaporize the liquid inside. The straight pipe is mainly for convenient disassembly, so that the liquid inlet and outlet of the coiled pipe are at the same end and can be directly taken out. A relatively high pressure is formed inside the straight pipe, which is prone to fouling and blockage.

[0072] When using the improved large-diameter pipe 31, it is necessary to make the liquid mainly heated and heated in the coil pipe 32 as much as possible, and a large amount of liquid is vaporized in the large-diameter pipe 31. To achieve this purpose, first, the coil pipe 32 uses a pipe with an inner diameter of 3.8 to 6.8 mm, which reduces the heating efficiency compared with a pipe with an inner diameter of 3 to 3.5 mm. Secondly, since the pipes at the tail end of the coil pipe 32 are closely arranged, the flame is concentrated in the flame channel and heats the large-diameter pipe 31 intensively. More heat can be absorbed and utilized, and a large amount of liquid can be vaporized in the inner cavity 311 of the large-diameter pipe 31.

[0073] The above area enables heating and vaporization to be carried out in separate areas, and it does not rule out that some medium will be vaporized in the coil pipe 32. The purpose of this solution is to make most of the liquid medium vaporize in the large-diameter pipe 31, so as to utilize the large space to reduce the pressure in this area.

[0074] In one embodiment, the length of the interval where the coil pipes 32 are closely arranged is L, and this length L is 1 / 3 of the length of the coil pipe 32. In the remaining length range, a gap of 3 to 5 mm or a larger gap can be formed between adjacent pipes in the coil pipe 32. For example, in this length range, the closely arranged coil pipes 32 can keep the flame surrounding the outer periphery of the large-diameter pipe 31, providing strong heating conditions for the large-diameter pipe 31. Thus, the problem of low heat absorption efficiency caused by the increase in the inner diameter can be compensated.

[0075] In another feasible embodiment, the length L is 2 / 3 of the length of the coil pipe 32, and a larger gap is formed between the pipes in the remaining part for the flame to pass through.

[0076] In addition, it is also possible to make the pipes of the entire coil pipe 32 closely arranged, as Figure 5 shown. In this embodiment, the coil pipe 32 has a certain distance from the cover plate at the head end, so as to leave a channel for the flame to burn. The burning flame needs to discharge gas to the outside of the housing 2. The gap between the pipes or the reserved distance can enable the flame flue gas to quickly discharge to the outside of the housing at the head end position, avoiding the formation of a high pressure in the housing 2.

[0077] In some possible embodiments, the spiral ring of the coil pipe 32 is an equal-diameter structure.

[0078] In other embodiments, as Figure 6 shown, the spiral ring of the coil pipe 32 is a conical structure, and its radial dimension at the tail end is larger than that at the head end.

[0079] As a deformation of the large-diameter pipe 31, it can be a structure composed of two end pipes, and the inner diameters of both end pipes are larger than the inner diameter of the coil pipe 32.

[0080] In Figure 6In an embodiment, the coil pipe 32 may adopt a relatively sparse spiral ring. The diameter of the pipe on the side of the wide-diameter pipe 31 close to the tail end is relatively small, which can absorb heat and vaporize better. Then, the larger pipe at the head end is used to further increase the pressure-containing space.

[0081] In some embodiments, the end of the housing 2 has a flame cover plate. The wide-diameter pipe 31 penetrates the flame cover plate, so that the nozzle 4 can be connected to the wide-diameter pipe 31 from the outside of the flame cover plate. Or the wide-diameter pipe 31 is welded to one side of the flame cover plate, the nozzle 4 is welded to the other side of the flame cover plate, and a communication hole is opened on the flame cover plate. Or, the nozzle 4 penetrates the flame cover plate and is connected to the wide-diameter pipe 31.

[0082] As another embodiment of the nozzle 4, the nozzle 4 is detachably installed at the head end of the wide-diameter pipe 31, such as in a threaded form; or in an existing form of snap connection by rotation, etc. When the nozzle 4 is separated from the wide-diameter pipe 31, the scale in the inner cavity 311 can be directly cleaned by using an external tool.

[0083] Specifically, the nozzle 4 includes a connector 41 and a nozzle 42. The connector 41 is connected to the wide-diameter pipe 31 in a threaded connection manner. In one embodiment, as Figure 7 shown, the connector 41 adopts an external thread structure, and an internal thread is provided at the end of the wide-diameter pipe 31 to realize the connection between the two. In another embodiment, the connector 41 can be a larger pipe orifice and has an internal thread, and an external thread is provided at the end of the wide-diameter pipe 31 to realize the connection between the two.

[0084] In Figure 8 the shown embodiment, the head end of the wide-diameter pipe 31 has a cover plate 312 for blocking the inner cavity 311. On the other side of the cover plate 312, an interface pipe 313 of the wide-diameter pipe 31 is led out. The interface pipe 313 is welded to the cover plate 312. The inner diameter of the interface pipe 313 is smaller than the inner diameter of the wide-diameter pipe 31, so that the wide-diameter pipe 31 is connected to the nozzle 4 with a smaller interface. Since high pressure will be formed inside the wide-diameter pipe 31, it is difficult to seal if the threaded opening is large. By using the interface pipe 313 with a smaller inner diameter, for example, the inner diameter of the interface pipe 313 is 6-10 mm, it is easier to achieve sealing.

[0085] In other embodiments, the interface pipe 313 has a threaded structure for connecting the nozzle 4, so as to realize the detachable connection between the nozzle 4 and the wide-diameter pipe 31. Further, the depth of the thread of the interface pipe 313 in the axial direction is not less than 4 mm to ensure the sealing performance.

[0086] Figure 7 and Figure 8These are just two examples of the nozzle 4, and it does not mean that it only has the connector 41 and the nozzle 42. In specific implementation, the nozzle 4 adopted can be formed by combining different components. The connector 41 can be composed of multiple parts, and the form of the nozzle 42 can also be changed. For example, part of the structure of the nozzle 4 penetrates through the flame cover plate and is connected to the wide-diameter pipe 31. The connector 41 and the nozzle 42 can be an integral structure or a split connection structure.

[0087] Combined with the above implementation manners, in order to prevent the flame from spraying forward, a flame cover plate is connected to the front end of the housing 2. The end of the wide-diameter pipe 31 penetrates through the flame cover plate, and the flame cover plate is connected to the housing 2, which can be a snap connection or a bolt connection. The coil pipe 32 can be led out from the end notch of the housing 2 and connected to an external additive tank through the additive pipe 321. There may be no obvious demarcation between the additive pipe 321 and the coil pipe 32. They can be the same connected pipe or two pipes combined together.

[0088] In a preferred implementation manner, for the convenience of fixing, the ends of both the wide-diameter pipe 31 and the coil pipe 32 pass through the flame cover plate. By removing the flame cover plate, the wide-diameter pipe 31 and the coil pipe 32 can be taken out simultaneously.

[0089] In Figure 8 In an implementation manner shown, the cover plate 312 of the inner cavity 311 can have a relatively large outer diameter, which is larger than the outer diameter of the wide-diameter pipe 31. Thus, this cover plate 312 can be used as the flame cover plate and connected to the housing 2.

[0090] Figure 9 Another structural embodiment of the nozzle 4 is shown. The nozzle 4 includes a connector 41 and a nozzle 42. The connector 41 is connected to the interface pipe 313 of the wide-diameter pipe 31 in a threaded connection manner. The nozzle 42 has a variable-diameter structure to form a smaller spray opening to change the medium flow rate to achieve atomization.

[0091] In Figure 9 the implementation manner, a chemical agent spray opening 43 is also provided in cooperation with the nozzle 42. The chemical agent spray opening 43 intersects with the channel of the nozzle 42, so that the chemical agent and the steam medium can be mixed.

[0092] As a specific embodiment, the provided atomizing injection device includes a blower 12, a combustion mechanism 11, a housing 2, and a nozzle 4 arranged in sequence. The blower 12, the combustion mechanism 11, and the housing 2 are located on the same center line. A heating pipe 3 is installed in the housing 2, and the heating pipe 3 is communicated with the nozzle 4. The heating pipe 3 includes a wide-diameter pipe 31 and a coiled pipe 32. The tail end of the wide-diameter pipe 31 is close to the combustion mechanism 11, and the liquid inlet at the tail end of the wide-diameter pipe 31 is communicated with the liquid outlet of the coiled pipe 32. The wide-diameter pipe 31 is of a straight pipe structure, and the coiled pipe 32 surrounds the outer periphery of the wide-diameter pipe 31. At least the pipes on the side of the head end of the coiled pipe 32 are closely arranged, and an annular flame channel is formed between the inner wall of the coiled pipe 32 and the wide-diameter pipe 31.

[0093] The inner diameter of the coiled pipe 32 is 4.5 - 6.5 mm, and the inner diameter of the wide-diameter pipe 31 is 3 - 4 times the inner diameter of the coiled pipe 32, so that the wide-diameter pipe 31 forms an expansion and pressure reduction space relative to the coiled pipe 32. The inner diameter of the wide-diameter pipe 31 can be controlled at 14 - 22 mm, the distance between the inner wall of the spiral ring of the coiled pipe 32 and the wide-diameter pipe 31 is 6 - 15 mm, and the distance between the coiled pipe 32 and the inner wall of the housing 2 is 1 - 5 mm.

[0094] An oil injection port is arranged on the end face of the combustion mechanism 11 facing the housing 2. In the cross-sectional projection, the oil injection port is located inside the spiral ring of the coiled pipe 32, and the distance between the tail end of the wide-diameter pipe 31 and the oil injection port is 18 - 38 mm, so that the flame can be better guided to the flame channel. The nozzle 4 is detachably connected to the head end of the wide-diameter pipe 31 and is used for ejecting a high-temperature and high-pressure medium to form atomized particles.

[0095] An atomizing injection method provided by the present invention uses an atomizing injection device for atomization. The atomizing injection device is configured to have a combustion mechanism 11, a housing 2, and a nozzle 4. A heating pipe 3 is installed in the housing 2, and the heating pipe 3 is communicated with the nozzle 4; the combustion mechanism 11 injects a flame into the housing 2 to heat the heating pipe 3.

[0096] It should be noted that in this embodiment, the heating pipe 3 is configured to include a wide-diameter pipe 31 and a coiled pipe 32. The tail end of the wide-diameter pipe 31 is close to the combustion mechanism 11, and the liquid inlet at the tail end of the wide-diameter pipe 31 is communicated with the liquid outlet of the coiled pipe 32; the liquid medium is first rapidly heated and raised in temperature in the coiled pipe 32, and then enters the wide-diameter pipe 31 for further heating and vaporization. The inner diameter of the wide-diameter pipe 31 is not less than 2 times the inner diameter of the coiled pipe 32, and the inner cavity 311 of the wide-diameter pipe 31 forms a larger volume space, so that there is a large pressure difference between the liquid inlet of the coiled pipe 32 and the inner cavity 311, and the pressure in the inner cavity 311 is greater than the external air pressure, and the liquid medium is atomized when ejected from the nozzle 4.

[0097] The method adopted in this embodiment changes the traditional single-tube heating method to a double-tube heating method. That is, the traditional steam sprayer directly uses a coil tube for heating, and in order to obtain a relatively large thermal efficiency for the coil tube, the straight tube arranged in the middle mainly serves the function of facilitating disassembly. Since it is subject to a large amount of heat, it is most likely to be blocked. In the improved solution, the relatively large inner cavity 311 of the wide-diameter tube 31 provides space for the vaporization of the liquid medium, thereby effectively releasing the high pressure formed in the narrow space. Furthermore, a larger pressure difference can be formed at both ends of the coil tube 32, accelerating the flow rate of the liquid in the coil tube 32. The crystals precipitated in the coil tube 32 can be continuously washed into the inner cavity 311 of the wide-diameter tube 31, and many precipitated particles can be ejected from the nozzle. Therefore, the blockage condition of the coil tube 32 can be well alleviated.

[0098] In this method, an annular flame passage is configured between the spiral ring of the coil tube 32 and the wide-diameter tube 31; the inner diameter of the coil tube 32 is 4.0 - 6.8 mm, and the inner diameter of the wide-diameter tube 31 is 2.5 - 4.5 times the inner diameter of the coil tube 32, so that the wide-diameter tube 31 forms a space for expanding volume and reducing pressure relative to the coil tube 32.

[0099] To facilitate the cleaning of the scale in the wide-diameter tube 31, the nozzle 4 can be detachably connected to the wide-diameter tube 31 in a threaded manner. A flame cover plate is provided at the head end of the housing 2. The wide-diameter tube 31 is fixedly connected to the flame cover plate, and an interface tube 313 is formed outside the flame cover plate. The interface tube 313 is provided with a threaded connection port smaller than the inner diameter of the wide-diameter tube 31 for connecting the nozzle 4

[0100] During implementation, the blower 12 can be connected to the tail end or side of the combustion mechanism 11 to supply air to the combustion mechanism 11. The fuel and air are mixed and blown out at the same time, injected into the housing 2, and burned in the housing 2. The liquid inlet of the coil tube 32 is connected to an external additive tank through an additive tube 321 to convey additives to the coil tube 32. The additives are heated inside the coil tube 32, and a small amount of the additives are vaporized. A large amount of liquid is heated to a high temperature when flowing towards the liquid outlet of the coil tube 32, enters the wide-diameter tube 31 for further heating and vaporization, and reaches an atomization effect after being ejected from the nozzle 42.

[0101] In one implementation manner, the pipes on one side of the head end of the coil tube 32 are closely arranged to direct the flame to the flame passage; a gap for the flame to pass through is formed between the pipes on the side of the coil tube 32 close to the tail end, and the length L of the closely arranged section is 4 / 5 of the length of the coil tube 32. In another implementation manner, the coil tube 32 has an equal-diameter structure, the pipes between the coil tubes 32 are arranged at equal intervals, and the adjacent pipes are closely arranged to direct the flame to the flame passage.

[0102] Compared with the prior art, in this embodiment, the pipes of part of the coil 32 are closely arranged, and the coil 32 is mainly heated unidirectionally. Further, the diameter of the coil 32 is increased, reducing the heat absorption efficiency of the liquid in the coil 32, which enables the liquid to quickly enter the wide-diameter pipe 31 for vaporization. At the same time, the heat transferred to the housing 2 is reduced, and the anti-scalding effect is also achieved. When operating the handle 5 on the outer side of the housing 2, it is not easy to be scalded.

[0103] Further, as a protective measure, an anti-scalding cover can also be provided on the outer side of the housing 2. The anti-scalding cover can be provided with a plurality of ventilation holes to facilitate heat dissipation and reduce the surface temperature of the housing 2.

[0104] When implementing the above method, the atomizing spraying device adopted can be implemented by using the structures provided in other embodiments, and the implementation manners between the various parts of the atomizing spraying device can also be combined with each other, which will not be elaborated one by one.

[0105] The above schematically describes the present invention and its embodiments. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the present invention, creatively design a structural manner and an embodiment similar to the technical solution, they shall fall within the protection scope of the present invention.

Claims

1. An atomizing spray device, characterized in that: include: A combustion mechanism (11) for providing a flame for burning fuel; A shell body (2), wherein the rear end of the shell body (2) is sealed and connected to the combustion mechanism (11), and a smoke exhaust passage is provided at the front end of the shell body (2), and the flame generated by the combustion mechanism (11) burns inside the shell body (2); A heating tube (3) is arranged in the shell (2), comprising a wide-diameter tube (31) and a coil (32); wherein the coil (32) is a spiral structure and extends in a spiral along the axial direction of the shell (2); The wide-diameter tube (31) is sleeved in the coil tube (32) in the form of a straight tube, and the liquid inlet at the rear end thereof is connected to the liquid outlet of the coil tube (32); the inner diameter of the wide-diameter tube (31) is not less than twice the inner diameter of the coil tube (32); the distance between the rear end of the wide-diameter tube (31) and the end face of the combustion mechanism (11) is not less than 15 mm, so as to form a fuel injection area; A nozzle (4) is connected to the head end of the wide-diameter pipe (31), and after the high-pressure medium is sprayed out from the nozzle (4), atomized particles are formed.

2. An atomizing spray device according to claim 1, characterized in that: The inner diameter of the coiled tube (32) is 3.8 to 6.8 mm, and the inner diameter of the wide-diameter tube (31) is 2.5 to 4.8 times the inner diameter of the coiled tube (32).

3. An atomizing spray device according to claim 2, characterized in that: The wide-diameter tube (31) has an inner diameter of 14-22 mm.

4. An atomizing spray device according to claim 2, characterized in that: At the tail end of the coil (32), the radial distance between the coil (32) and the housing (2) is no greater than 8 mm.

5. The atomizing spray device according to claim 2, characterized in that: At the rear end of the coil (32), the spacing between the spiral ring surrounded by the coil (32) and the wide-diameter tube (31) is not less than 4 mm, forming a flame channel for guiding the flame.

6. An atomizing spray device according to claim 5, characterized in that: The pipes at least on one side of the rear end of the coil (32) are closely arranged; the length of the interval in which the coil (32) is closely arranged is L, and the length L is not less than 1 / 3 of the length of the coil (32).

7. The atomizing spray device according to claim 1, characterized in that: The nozzle (4) is detachably mounted on the head end of the wide-diameter tube (31); the end of the housing (2) has a flame cover plate; the wide-diameter tube (31) penetrates the flame cover plate, so that the nozzle (4) can be connected to the wide-diameter tube (31) from the outside of the flame cover plate.

8. An atomizing spray device according to claim 7, characterized in that: The tail end of the wide-diameter pipe (31) adopts an interface pipe (313) structure, and the inner diameter of the interface pipe (313) is smaller than the inner diameter of the wide-diameter pipe (31), so that the wide-diameter pipe (31) is connected to the nozzle (4) via a smaller interface.

9. An atomizing spray device according to claim 8, characterized in that: The interface pipe (313) has an internal thread, the depth of which in the axial direction is not less than 4 mm.

10. The atomizing spray device according to claim 7, characterized in that: The head end of the coiled tube (32) passes through the flame cover plate, and the wide-diameter tube (31) and the coiled tube (32) can be taken out simultaneously by removing the flame cover plate.

11. The atomizing spray device according to claim 1, characterized in that: The spray head (4) comprises a connector (41) and a nozzle (42); the connector (41) is connected to the wide-diameter pipe (31) in a threaded manner; and the nozzle (42) has a variable diameter structure to change the flow rate of the medium to achieve atomization.

12. An atomizing spray device according to claim 11, characterized in that: The nozzle (42) is provided with a medicine nozzle, and the medicine nozzle intersects with the nozzle (42) channel, so that the medicine and the steam medium can be mixed.

13. The atomizing spray device according to claim 1, characterized in that: The combustion mechanism (11) is coaxially arranged with the shell (2); an oil injection port is arranged on the end surface of the combustion mechanism (11) facing the shell (2); in cross-sectional projection, the oil injection port is located within the spiral ring of the coil (32).

14. An atomizing spray device according to claim 13, characterized in that: A fan (12) is provided on the side of the combustion mechanism (11) facing away from the housing (2); the fan (12), the combustion mechanism (11) and the housing (2) are located on the same center line.

15. An atomizing spraying method, characterized in that: Atomization is performed using an atomizing spray device, the atomizing spray device being configured to include a combustion mechanism (11), a shell (2) and a nozzle (4); a heating tube (3) is installed in the shell (2), and the heating tube (3) is connected to the nozzle (4); the combustion mechanism (11) sprays flame into the shell (2) to heat the heating tube (3); The heating tube (3) is configured to include a wide-diameter tube (31) and a coil (32); the wide-diameter tube (31) is sleeved inside the coil (32); the rear end of the wide-diameter tube (31) is close to the combustion mechanism (11); the distance between the rear end of the wide-diameter tube (31) and the end surface of the combustion mechanism (11) is not less than 15 mm; the liquid inlet at the rear end of the wide-diameter tube (31) is connected to the liquid outlet of the coil (32); the liquid medium is first rapidly heated and heated inside the coil (32), and then enters the wide-diameter tube (31) to be further heated and vaporized; The wide-diameter tube (31) is configured to have an inner diameter not less than twice the inner diameter of the coil tube (32), so that the inner cavity (311) of the wide-diameter tube (31) forms a relatively large volume space, so that there is a relatively large pressure difference between the liquid inlet of the coil tube (32) and the inner cavity (311), and the pressure in the inner cavity (311) is greater than the external air pressure, so that the liquid medium is atomized when sprayed from the nozzle (4).

16. An atomizing spraying method according to claim 15, characterized in that: An annular flame channel is arranged between the spiral ring of the coil (32) and the wide-diameter tube (31); the inner diameter of the coil (32) is 4.0 to 6.8 mm, and the inner diameter of the wide-diameter tube (31) is 2.5 to 4.8 times the inner diameter of the coil (32), so that the wide-diameter tube (31) forms an expanded and pressure-reduced space relative to the coil (32).

17. The atomizing spraying method according to claim 15, characterized in that: The nozzle (4) can be detachably connected to the wide-diameter pipe (31) in a threaded manner.

18. An atomizing spraying method according to claim 17, characterized in that: A flame cover plate is provided at the head end of the shell (2), the wide-diameter tube (31) is fixedly connected to the flame cover plate, and an interface tube (313) is formed on the outside of the flame cover plate. The interface tube (313) is provided with a threaded connection port having an inner diameter smaller than that of the wide-diameter tube (31) and is used for connecting the nozzle (4).

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